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Roof and gutter de-icing

Cables in gutters, valleys and downpipes stop ice dams and icicles forming, protecting the roof, gutters and people below.

Image: DEVI

Self-limiting cable fitted in gutters, valleys and downpipes stops ice dams and icicles forming, protecting the roof, gutters and people below. Output rises as it gets colder and falls as it warms.

Benefits and advantages

Prevents ice dams, blocked gutters and falling icicles
Self-limiting output adjusts along the cable to local conditions
Cut to length on site and fitted directly to the gutter system
Small, flexible cable that's quick to install
Automatic control with roof sensors

System design starting points

DEVIiceguard 18 (18 W/m at 10 °C) in gutters and downpipes; DEVIsnow 30T for larger roof areas
Run the cable the full length of gutters and down the downpipes so meltwater can drain
DEVIreg 850 IV with roof sensors (moisture and temperature), or a DEVIreg 330 thermostat
Protect with an RCD (maximum 30 mA trip current)

Typical uses

Alpine homes and lodgesGutters and downpipesRoof valleys and edges

Products

DEVIiceguard DEVIsnow 30T DEVIreg 850 IV DEVIreg 330

Reference: DEVIiceguard and DEVIsnow, Heat Zone 2026 catalogue p. 21, 28–29, 35

Enquire about roof and gutter de-icing →

System performance depends on design, installation and site conditions. Talk to us before you order so the output, layout and controls suit your project.

Other applications

Indoor

Under-tile floor heating

Thin heating mats or cables set in tile adhesive directly under the tiles. Fast to warm up, ideal for bathrooms, ensuites and kitchens in new builds and renovations.

Indoor

In-screed and in-slab heating

Heating cable laid in a sand-cement screed or concrete slab. The mass stores heat and releases it evenly, which suits whole-home heating and open-plan spaces.

Indoor

Timber and floating floors

A dry system with no screed. Aluminium-topped plates spread heat from a low-output cable under floating timber, laminate or engineered boards.

Outdoor

Snow and ice melting

Heating cables in driveways, ramps, stairs and paths keep surfaces clear of ice and snow. Sensors switch the system on only when it's cold and wet.

Frost

Pipe frost protection

Self-limiting cable fixed along water pipes and under insulation stops them freezing and bursting in exposed or unheated locations.

Commercial

Hot water temperature maintenance

Keeps hot water pipes at temperature so hot water arrives quickly at every outlet, reducing water waste in large buildings.

Commercial

Cold storage frost-heave protection

Low-output cable under freezer and cool-room floors keeps the ground beneath above freezing, preventing frost heave that cracks and lifts slabs.

Commercial

Sports field heating

Cables laid below the turf keep the root zone and surface free of frost so pitches stay playable through winter.

Agriculture

Vineyards and horticulture

Heating cables along the vine wire protect buds from spring frost. Also used for propagation beds and greenhouse soil warming.

Agriculture

Agriculture and livestock

Heating cables in soil, seed beds and animal floors protect crops, seedlings and livestock from frost and cold stress.